Clean up images and patterns

Changes proposed in this pull request

This PR removes unused icons and pattern files.

Icons:

Unused icons were removed.
Note: Some icons were not deleted as they might have a future use (like social media icons). I considered removing all icons unless they are in use but I kept them in case we need a simple icon like a chevron.

Patterns:

All pattern files were removed.
The patterns and patterns/images directories are still in the theme, just empty. This will be the location of patterns when they are added in future projects. The images directory is used by the pattern managers plugin.
The legacy patterns for breadcrumbs and copyright are no longer used.

Closes https://app.asana.com/0/1203895219649773/1206815771033351/f https://app.asana.com/0/1203895219649773/1206815771033356/f

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matchboxdesigngroup / kindling